Abstract: The recycling use of discarded buildings is a popular topic at present. Detailed research was conducted onmissionary school constructed during the period of the Republic of China: the main building of Seminario, RegionaleHonan-Kaifeng. Construction plans and elevations were plotted through on-the-spot investigation, and based onfirsthand information, it was made a deep and meticulous analysis of the construction ＇s spatial distribution anddecoration, and put forward the feasibility protection scheme. Attention is paid to this building and moreover, protection and utilization are what this research expects.